OPTICAL FILTERS

Photonics SpectraAug 2005From Semrock Inc. is the 2005 catalog titled “The Standard in Optical Filters for Biotech & Analytical Instrumentation.” Along with tutorials and technical notes, the 28-page, full-color catalog specifies the BrightLine filters for fluorescence instrumentation and microscopes, including the Zero series for exact image registration and the multiband types for high brightness, contrast and color balance. Among other offerings are the RazorEdge filters for Raman spectroscopy, the StopLine deep notch filters, the MaxLine laser-line filters and the MaxMirror laser mirror, which covers an ultrabroadband range. Numerous charts and diagrams are provided.

An optical element that blocks or transmits a selected wavelength of light. Optical filters can either be absorption filters or interference filters. Absorption filters absorb any unwanted wavelengths while the interference filter will use the effects of constructive and destructive superposition to transmit only the selected wavelength.